Looking at the current LED indicators, in the general publicity, the three indicators that are most likely to cause misunderstanding are power, life and efficiency. In this issue, we continue to discuss the parameters - life. Life expectancy is similar to power. There are also three concepts commonly used for life. They are: 1. The cell life of the lamp bead; 2. The life of the lamp bead in practical applications; 3. The life of the driver. These three life concepts constitute the life of the luminaire, and the shortest part of the life determines the life of the luminaire. Here, I want to explain a common mistake, which is 50,000 hours. This statement is derived from Cree and has a special description on its official website. The general idea is that Cree has found an independent third-party laboratory, according to LM. The -80 standard measures their luminaires; as a result, under the "normal use conditions", after 6000 hours of measurement, the result of the lamp life of 50,000 hours was obtained. Cree also cautions that any changes in initial conditions or parameters will affect the useful life of the LEDs to varying degrees. Please note this paragraph: First, Cree does not give the name of an independent third-party laboratory, so the original record is not public; Second, Cree does not give the meaning of the so-called "normal use conditions", please note This condition can be inconsistent with "daily use conditions"; in the end, Cree cautions that initial conditions or changes in parameters will affect the life of LED luminaires. As can be seen from the above description, this experiment is for reference only and is not very strict, so the "50,000-hour life" cannot be used as a reliable basis for publicity. In general, in the case of sufficient heat dissipation (here, junction temperature, English writing Tj, working under 850C), the life of LED single lamp beads can reach 35,000 hours. This cell life and LED can be compared in the actual operation of the luminaire. Of course, because many lamps on the market do not have the so-called "sufficient heat dissipation", that is, the junction temperature of LED lamp beads is often 950C or 1000C, or even higher, then the life of the lamp bead in practical applications is Shorter. Therefore, in general, the life of the lamp bead is shorter than the life of the LED single lamp bead, especially in the case where the structure of the lamp is unreasonable and the heat dissipation is not fully guaranteed. Finally, the problem of LED "difficult" is that the life of mainstream drivers on the market is much lower than the life of LED lamps. Of course, the essence of the problem is that the driving technology structure is unreasonable, resulting in low efficiency, so that the temperature rise is high; the temperature distribution caused by the technical structure is not uniform, thereby greatly reducing the life of the LED driver. In summary, these three concepts constitute the life of LED lamps, of which the current main constraint is the life of LED drivers.
About high speed Door Accessories:
1.Driving system: High Speed Door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box
2.Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light
For some main accessories, here is detain introduction:
1).24G radar sensor:
Brand: Hofic
Technology: Microwave processor
Maintain time: 0.5s
Protection: IP54
Transmitting frequency: 24.125GHz
Maximum installation height: <5meter
Transmitting power density: <5mw/cm2
Power consumption: <1W(VA)
Installation angle: 0-90°(lengthways) -30-30°(crosswise)
Supply voltage: AC&DC 12V-30V
2).Photocell:
Approval CE & ISO9001
Power supply AC/DC 12-30V
Static current 25A
Action current 40mA
Mounting distance Max 10m
NO or NC contact Done by NO./NC. contact selection
Working environment temperature -42℃ to +45℃
Working environment humidity 10 to 90%RH
Appearance dimensions( controller) 123*50*32mm(L*W*H)
Appearance dimensions(Magic eye head) 19*13mm(L*D)
3). Remote control
Operating Voltage: AC220V/50HZ+-20%
Transmit power:≤100mW;Super regenerative module, strong anti-interference
Operating temperature:-30℃-+70℃
Working frequency: 433MHZ;transmitter 1527, millions of encoding chip
Accept sensitivity:≤110dB
Manipulation method: electric remote control
Configure the quantity: Wireless number; factory configuration transmitter two. Can be equipped with PT2272 digital decoder chip
Configure the function: Up, down, stop, anti-lock full-featured reproduction
4). Magnetic loop
Voltage: 12V AC/DC +-10% 24V 115V AC+-10% 230V
Power: <2VA
Continued electrical output: 7A / 250V AC
Frequency range: 20 to 200K Hz
Response time: infinity (factory setting) or adjust maintain time
Sensitivity: 0.01% to 0.1% divided into 3 levels
Protection level: IP30
Electromagnetic compatibility (EMC) Complies with EM50081-1 and EN50082-2
Detection loop inductance: the limit of 40uH to 100uH ideal value 80uH to 300uH
Operating temperature: -25 ℃ to 70 ℃
Storage temperature: -40 ℃ to 85 ℃
Relative humidity: <90% non-condensing
Temperature compensation: automatic compensation up to 50 ℃ / h
Connection type: 11 pin DIN rail socket
Dimensions: 41 * 78 * 85 mm (width * height * length)
Weight: 250 grams
5). manual push button
This exit switch button is made of ABS and has built-in indicator light make it looks more elegant and fashionbale. It can be widely used in public entrance gates, public door, home, office, hotel, etc.
Door Exit Button Push To Exit Switch Door Opener For Access Control Security
Main Feature
Fashionable appearance
Made of ABS Plastic
Easy to install and operate
Used for access control
Specification
Mechanical Life: 500,000 test
Material: Plastic
6). Limit switch encoder
Voltage: DC5V-24V
Output voltage: high voltage≥85%Vcc, low voltage≤0.5V
Maximum mechanical speed:6000rpm
Anti-vibration: 50m/s,10-200HZ,XYZeach way 2 times.
Current consumption:≤30mA
Response frequency: 0-100KHZ
Protection: waterproof,oil proof,dust prevention, IP54
The output code system: binary code
Operating life: MTBF≥30000(+25℃,2000rpm)
Rotational inertia:4.0x10-8kgm²
Maximum load:radial direction20N
Axial direction:10N
Weight: about 0.4kg
High Speed Door Accessories,High Speed Door,Electronic High Speed Door Accessories Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfhighspeeddoor.com